ABB Interface Relay RB122A

Description

The ABB RB122A is a high-quality pluggable interface relay designed for industrial automation and control systems. It provides a reliable interface between low-power control signals and higher-power loads. With its versatile 48-60V AC/DC coil, it can be integrated into a wide variety of control circuits. The two changeover contacts (2 C/O) offer flexibility for switching multiple circuits or for use in interlocking applications.

Specifications

• Manufacturer: ABB
• Type: RB122A
• Part Number: 1SNA645040R1500
• Coil Voltage: 48-60V AC/DC
• Contact Configuration: 2 C/O (DPDT, Double Pole Double Throw)
• Contact Rating: 8A at 250V AC
• Mounting: DIN Rail
• Terminals: Screw terminals

Label Info

• Brand: ABB Entrelec France
• Model: RB122A 48-60vac/dc
• Order Code: 1SNA 645 040 R1500

Application

This interface relay is commonly used for electrical isolation, signal amplification, and as an output interface for PLCs. It is suitable for switching small motors, contactors, solenoids, and indicator lamps in industrial machinery and process control.

Country of Origin

This product is made in France.

CO2 Impact

By purchasing this reused component, you are contributing to a circular economy and helping to avoid 1.6 kg of CO2 emissions associated with the production of a new one. This saving is comparable to the emissions from driving a car for 8 kilometers.

Availability

This item is in stock and ready for immediate dispatch. Order now from PLC2Day for expert support and fast delivery.

FAQ

Is the relay element itself replaceable?

Yes, the RB122A is a pluggable relay. The relay module can typically be removed from the socket base for easy replacement without disturbing the wiring.

The S1 terminal is often used for connecting an optional plug-in function module, such as a surge suppressor or LED indicator, depending on the specific socket used with the relay.

While the AC rating is 250V at 8A, the DC switching capability is significantly lower due to the potential for arcing. Always consult the official ABB datasheet for the specific DC load curve and ratings before use.

Last Update: Friday, March 13, 2026

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